用 iPhone 的 sqlite 数据库读写图片，先把你的图片转换成 NSData 形式，然后在数据库添加一行 blob 数据，代码如下（data就是图片） ：
 
NSMutableString *insertsql = [[NSMutableString alloc] initWithString:@"INSERT INTO "];
[insertsql appendString:BLOB];
[insertsql appendString:@" ("];
[insertsql appendString:BLOB_DATA];
[insertsql appendString:@") VALUES(?1)"];
sqlite3_stmt *insert_statement = nil;
sqlite3 *database = 你的数据库;
if (sqlite3_prepare_v2(database,[insertsql UTF8String],-1,&insert_statement,NULL) == sqlITE_OK) {
    sqlite3_bind_blob(insert_statement,1,[data bytes],[data length],NULL);
    if(sqlite3_step(insert_statement) != sqlITE_DONE) {
        NSLog(@"Db error %s",sqlite3_errmsg(database));
    }
} else {
    NSLog(@"Db error %s",sqlite3_errmsg(database));
}
sqlite3_finalize(insert_statement);
[insertsql release];
 
 
 
//获取表格中所有的记录，放到数组fChannels中。
 
- (void) getChannels:(NSMutableArray*)fChannels{
 
char *sql = "SELECT * FROM channels where id = 2";
 
sqlite3_stmt *statement;
 
int success = (sqlite3_prepare_v2(database_,sql,&statement,NULL));
 
if (success == sqlITE_OK) {
 
if (sqlITE_ROW == sqlite3_step(statement)) {
 
const unsigned char *cid = sqlite3_column_text(statement,1);//获取log的字符串，’1‘是第2列
 
const unsigned char *dtitle = sqlite3_column_text(statement,2);
 
Byte* imageData = (Byte*)sqlite3_column_blob(statement,3);
 
int imageLen    = sqlite3_column_int(statement,4); 
 
_titleLabel.text = [NSString stringWithUTF8String:(char *)dtitle];
 
_iv.image = [UIImage imageWithData:[NSData dataWithBytes:imageData length:imageLen]];
 
sqlite3_finalize(statement);
 
}
 
sqlite3_finalize(statement);
 
}
 
}